The skin on the palmar surface of the hands and feet forms ridges, so-called papillary ridges, in patterns that are unique to each individual and which do not change over time. Even identical twins (who share their DNA) do not have identical fingerprints.
 
        
                    
             
        
        
        
Answer:
2) a feedback mechanism that regulates blood glucose level
 
        
             
        
        
        
Answer:
cant really answer much since you need the class results for these. but i can simplify question 1. so, does the class results prove that the traits made my dominant alleles are the most common? or in other words, are traits made  by dominant alleles most common in the class results? 
number 4 is yes because there are more possibilities that the dominant trait will occur than the recessive trait. therefore, it is more common and the conception is correct
 
        
             
        
        
        
Answer:  It will slow down.
Explanation:  This is because the same amount of blood that usually goes through will have to fit through a blocked vessel.  Only a little will be able to go through at one time, causing the blood flow on the other side to slow.
(That is really dangerous.  The build-up will eventually burst the vessel)  Just an FYI